Question

if the average human lifespan were of order 10 to the power 4 seconds what would be the revolution Period of the Earth on the scale be​

Answer 1

Answer:

Revolution period of earth / average human life span is calculated to be 107 /109 = 10-2, as 107 and 109 are the orders of magnitude.

New revolution period of earth is -10-2 x 104 = 102.

Thus, new revolution period of earth is calculated from the average human life span.